Studies on Disfigurement-Fee Technology of Drilling Carbon Fiber Reinforced Plastics

2007 ◽  
Vol 24-25 ◽  
pp. 125-132
Author(s):  
Yong Qi Wang ◽  
Yong Jie Bao ◽  
Hang Gao
Keyword(s):  
Carbon Fiber ◽  
Drilling Process ◽  
Fiber Reinforced ◽  
Drilling Force ◽  
Carbon Fiber Reinforced Plastics ◽  
Reinforced Plastics ◽  
Drilling Quality ◽  
New Type ◽  
Fiber Reinforced Plastics ◽  
Carbon Fiber Reinforced

Based on the analysis of various disfigurements of carbon fiber reinforced plastics formed in drilling process, the formation model of disfigurement is built up, and analysis results shows that the main reason of disfigurement is the exceeding cutting force. By focusing on these problems, new-type drill—super-hard electroplated abrasive drill is developed, and some experiments were carried out. Compared with the traditional sintered-carbide drill in drilling, the super-hard electroplated abrasive drill has lower drilling force, better drilling quality, higher machining efficiency, and longer life-span. A conclusion that super-hard electroplated drill is more suitable for drilling CFRP is gained.

Drilling Simulation on Carbon Fiber Reinforced Plastics and Aluminum Laminated Composite

2012 ◽  
Vol 490-495 ◽  
pp. 3281-3285
Author(s):  
Bo Li ◽  
Shu Nuan Liu ◽  
Xi Tian Tian ◽  
Fei Gao ◽  
Zhen Ming Zhang
Keyword(s):  
Carbon Fiber ◽  
Laminated Composite ◽  
Element Model ◽  
Drilling Process ◽  
Fiber Reinforced ◽  
Drilling Force ◽  
Carbon Fiber Reinforced Plastics ◽  
Reinforced Plastics ◽  
Fiber Reinforced Plastics ◽  
Carbon Fiber Reinforced

In order to study the process of drilling carbon fiber reinforced plastics and aluminum alloy laminated composite, a simulation on drilling is conducted by using FEM analysis software ABAQUS, the finite element model of carbon fiber composite material finite element model is established. The dynamic simulation of the drilling process of carbon fiber reinforced plastics is carry on, which based on the elastic-plastic theory of material deformation and the thermal coupling theory, obtaining continuous drilling force and torque data. The influence of material and parameters on drilling and drilling technology on drilling process are deeply analyzed, obtain relationship about material and feed rate and drilling force and torque. The result of the research provides the support for further study of high speed drilling mechanism of carbon fiber reinforced plastics.

scholarly journals Cutting Performance of Microcrystalline, Nanocrystalline and Dual-Layer Composite Diamond Coated Tools in Drilling Carbon Fiber Reinforced Plastics

2018 ◽  
Vol 8 (9) ◽  
pp. 1642 ◽  
Author(s):  
Jianguo Zhang ◽  
Yigao Yuan ◽  
Jinjiang Zhang
Keyword(s):  
Carbon Fiber ◽  
Cutting Performance ◽  
Fiber Reinforced ◽  
Drilling Force ◽  
Carbon Fiber Reinforced Plastics ◽  
Reinforced Plastics ◽  
Coated Tools ◽  
Layer Composite ◽  
Fiber Reinforced Plastics ◽  
Carbon Fiber Reinforced

The drilling of carbon fiber reinforced plastics (CFRP) is a significant topic for the aircraft industry. However, CFRP are materials which are difficult to cut due to their unique properties. This paper studies tools with excellent cutting performance in machining CFRP. The microcrystalline diamond (MCD), nanocrystalline diamond (NCD), and dual-layer composite MCD/NCD coatings are deposited on Co-cemented tungsten carbide (WC-Co) drills. The morphology of MCD shows pyramidal grains and the NCD and MCD/NCD coatings present cauliflower-like morphology. The cutting performances of coated tools are checked in CFRP drilling tests by the drilling force and tool wear. According to the results, the dual-layer composite MCD/NCD coated tools present the best cutting performance with the lowest drilling force. Meanwhile, the MCD/NCD coated tools display high resistance to wear and adhesive strength.

Research on Performance of Drilling Carbon Fiber Reinforced Plastics with Diamond Coated Special Drill

2015 ◽  
Vol 1088 ◽  
pp. 733-738
Author(s):  
Xiao Fan Yang ◽  
You Sheng Li ◽  
Zhi Long Xu ◽  
Ju Dong Liu ◽  
Bi Jin Wu
Keyword(s):  
Carbon Fiber ◽  
Surface Quality ◽  
Diamond Coating ◽  
Fiber Reinforced ◽  
Drilling Force ◽  
Carbon Fiber Reinforced Plastics ◽  
Reinforced Plastics ◽  
Exit Surface ◽  
Fiber Reinforced Plastics ◽  
Carbon Fiber Reinforced

The carbide cemented special drills with TiAlCrN/TiSiN coating and diamond coating respectively were selected to drilling on carbon fiber reinforced plastics (CFRP) for a contrast test in this paper. The drilling force , drilling exit surface quality and tool wear were analyzed separately to research the performance characteristics of the two kinds of special drills with different coating. The results show that: under the same cutting conditions, the thrust force of the special drill with diamond coating is smaller than that of the TiAlCrN/TiSiN coating, and the tool life is extended by 2 times at the same time. The diamond coated special drill can improve the drilling surface quality, it is more suitable for drilling CFRP.

Study on the 3D Pattern of Hole Wall in Drilling Carbon Fiber Reinforced Plastics Using Orthogonal Experiment

2014 ◽  
Vol 902 ◽  
pp. 58-62
Author(s):  
Xue Lin Li ◽  
Gui Yu Li ◽  
Xing Quan Li
Keyword(s):  
Carbon Fiber ◽  
Orthogonal Experiment ◽  
Spindle Speed ◽  
Fiber Reinforced ◽  
Carbon Fiber Reinforced Plastics ◽  
Reinforced Plastics ◽  
Hole Wall ◽  
Drilling Quality ◽  
Fiber Reinforced Plastics ◽  
Carbon Fiber Reinforced

The drilling damage forms of hole wall is presented and the reasons for drilling quality are analyzed in drilling carbon fiber reinforced plastics. Based on the study of experiments, the relationship between the drilling damage and the drilling parameters are obtained. The results indicate that the drilling hole wall forms drawn fiber and fallen off fiber bundle more easily and the surface roughness of hole wall becomes worse with the increase of the spindle speed, and the final drilling surface presents obvious anisotropy. In order to obtain good drilling quality, lower spindle speed should be selected on the premise of lower feed rate.

Study on Fabrication and Cutting Performance of CVD Diamond Coated Drills in Machining the Carbon Fiber Reinforced Plastics

2011 ◽  
Vol 175 ◽  
pp. 239-244
Author(s):  
Jian Guo Zhang ◽  
Bin Shen ◽  
Fang Hong Sun
Keyword(s):  
Carbon Fiber ◽  
Tungsten Carbide ◽  
Diamond Films ◽  
Cvd Diamond ◽  
Drilling Process ◽  
Fiber Reinforced ◽  
Carbon Fiber Reinforced Plastics ◽  
Reinforced Plastics ◽  
Fiber Reinforced Plastics ◽  
Carbon Fiber Reinforced

Carbon fiber reinforced plastics (CFRP) have been widely used for manufacturing spacecraft, aircraft and automobile structural parts in aerospace and automotive industries. However, CFRP is a kind of hard machining materials and conventional tungsten carbide drills always experience severe tool wear, and thus short lifetime in the CFRP drilling process. In this paper, the CVD diamond films are deposited on the surface of cobalt cemented tungsten carbide (WC–Co) drills using hot filament chemical vapor deposition (HFCVD) method. Scanning electron microscope (SEM) is adopted to investigate the surface morphology of as-fabricated CVD diamond coated drills, additional analysis using Raman spectrum also indicates the high purity of sp3 phase of as-deposited diamond film. Furthermore, the machining performance of as-fabricated CVD diamond coated drills is examined in drilling the CFRP, comparing with the uncoated WC-Co drills. The chisel edge and primary cutting edge wear of drills are studied using the tool microscope. The results show that as-fabricated CVD diamond coated drills exhibit a much elongated lifetime than that of uncoated WC-Co drills, and also smoother surface finish of machined holes, which is supposed to be attributed to the excellent wear resistance and satisfied adhesive strength between the as-deposited diamond films and drills.

CFRP Drilling with Brazed Diamond Core Drill

2011 ◽  
Vol 175 ◽  
pp. 27-32 ◽  
Author(s):  
Juan Mu ◽  
Jiu Hua Xu ◽  
Yan Chen ◽  
Yu Can Fu
Keyword(s):  
Carbon Fiber ◽  
Thrust Force ◽  
Fiber Reinforced ◽  
Carbon Fiber Reinforced Plastics ◽  
Reinforced Plastics ◽  
Drilling Quality ◽  
Near Net Shape ◽  
Fiber Reinforced Plastics ◽  
Carbon Fiber Reinforced

Despite the facts that carbon fiber reinforced plastics (CFRP) components are mostly produced near net shape, machining, especially drilling is often required in order to bring the component into dimensional requirements and prepare it for assembly. Rapid drill wear and serious machining defects are the key problems in CFRP drilling, and employing proper drill is an effective way to solve these problems. In this paper, tests of the brazed diamond core drill are presented and the related issues, such as the thrust force, the drilling quality and the drill wear are studied.

INCREASING SENSITIVITY OF EDDY CURRENT NON-DESTRUCTIVE TESTING OF DELAMINATION IN CARBON-FIBER REINFORCED PLASTICS

2021 ◽  
pp. 28-37
Author(s):  
P. N. Shkatov ◽  
G. A. Didin ◽  
A. A. Ermolaev
Keyword(s):  
Carbon Fiber ◽  
Eddy Current ◽  
Calculation Model ◽  
Fiber Reinforced ◽  
Destructive Testing ◽  
Carbon Fiber Reinforced Plastics ◽  
Reinforced Plastics ◽  
Fiber Reinforced Plastics ◽  
Carbon Fiber Reinforced ◽  
The Difference

The paper is concerned with increasing sensitivity of eddy current nondestructive testing of most dangerous delamination in carbon-fiber reinforced plastics (CFRP). Increased sensitivity is achieved by separate registration and comparison of eddy current signals obtained from a set of stratifications of carbon fibers with the same orientation. The separation of eddy current signals is possible due to pronounced anisotropy of the electrical conductivity of the layers dominant in the direction of the fibers of the corresponding layer. Eddy-current signals are registered by eddy current probes with maximum sensitivity in a given angular direction. Prior to the scan eddy current signals of the probe are leveled on a defect-free area. The influence of the working gap on the difference between the eddy current signals of the probe is suppressed by normalizing it according to one of the signals. The analysis of the registered signals from delamination has been performed using an approximate calculation model. The reliability of the obtained results has been confirmed by comparison with experimental results and calculations using the finite element method.

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